Headphone device



FIG. 1 is a perspective view of an embodiment of a headphone device showing my new design, as viewed from the top and front.

FIG. 2 is a front profile view of the headphone device shown in FIG. 1.

FIG. 3 is a back profile view of the headphone device shown in FIG. 1.

FIG. 4 is a first side profile view of the headphone device shown in FIG. 1.

FIG. 5 is a second side profile view of the headphone device shown in FIG. 1.

FIG. 6 is a plan view of the headphone device shown in FIG. 1; and,

FIG. 7 is an inverse plan view of the headphone device shown in FIG. 1.

The details shown in broken lines illustrate features that form no part of the claimed design. 

CLAIM The ornamental design for a headphone device, as shown and described. 